PDF Creator Terminal server: how it works?

Other little question!

We have a farm with 6 productives servers and one master. I will install the TS version on master server and do config on. but what is the rules for this not productive server? He will never be used for "using" pdf creator, but only to configure it. Is it needed to have a licence for him or can we manage it as a special server only for config?

thanks,